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I am trying to launch default video player using Qt.openUrlExternally("") but its not working.
No responce at all. I tried HTTP and RTSP links with 3gp and mp4 files.
The BB10 approach to doing this is with the Invocation Framework. For Cascades you can read about that here https://developer.blackberry.com/cascades/documentation/device_platform/invocation/index.html and for the NDK http://developer.blackberry.com/native/beta/documentation/app_integration.html (those may say the same thing... I haven't compared them).